PPP (Point-to-Point Protocol) is a Protocol for communication between two computers using a Serial interface, typically a personal computer connected by phone line to a server.
These settings are mergeable. Changes to these settings do not require a reboot of the system.
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Field
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Description
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CHAP Challenge Interval (secs)
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Default = 0 (disabled). Range = 0 to 99999 seconds.
The period between successive CHAP challenges. Blank or 0 disables repeated challenges.
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Header Compression
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Default = Off
Enables the negotiation and use of IP Header Compression as per RFC2507, RFC2508 and RFC2509.
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PPP Compression Mode
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Default = MPPC This option is used to negotiate compression (or not) using CCP. If set to MPPC or StacLZS the system will try to negotiate this mode with the remote Control Unit. If set to Disable CCP is not negotiated. The options are:
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Disable Do not use or attempt to use compression.
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StacLZS Attempt to use and negotiate STAC compression (the standard, Mode 3)
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MPPC Attempt to use and negotiate MPPC (Microsoft) compression. Useful for dialing into NT Servers.
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PPP Callback Mode
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Default = Disable
The options are:
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Disable: Callback is not enabled
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LCP: (Link Control Protocol) After authentication the incoming call is dropped and an outgoing call to the number configured in the Service will be made to reestablish the link.
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Callback CP: (Microsoft's Callback Control Protocol) After acceptance from both ends the incoming call is dropped and an outgoing call to the number configured in the Service is made to reestablish the link.
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Extended CBCP: (Extended Callback Control Protocol) Similar to Callback CP however the Microsoft application at the remote end will prompt for a telephone number. An outgoing call will then be made to that number to reestablish the link.
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Data Pkt. Size
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Default = 0. Range = 0 to 2048.
This is the number of data bytes contained in a Data Packet.
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BACP
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Default = Off
Allows negotiation of the BACP/BCP protocols. These are used to control the addition of additional B channels to simultaneously improve data throughput.
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Multilink
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Default = Off
When enabled the system attempts to negotiate the use of the Multilink protocol (MPPC) on the link(s) into this Service. Multilink must be enabled if the more than one channel is allowed to be Bundled/Multilinked to this RAS Service.
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